Clamp for snap-molds.



J. & T. H. GRAF. CLAMP FOR. SNAP MOLDS. APPLICATION I'I LED JUNE 8,1910.

980,869. Patented Jan. 3, 1911.

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HENRY J. GRAF AND THEODORE H. GRAF, 0F LOUISVILLE, KENTUCKY.

CLAMP FOR- SNAP-MOLDS.

Specification of Letters Patent.

Patented Jan. 3, 191.31..

T 0 all whom it may concern:

Be it known that we, HENRY J. Gear and THEODORE H. GRAF, citizens of theUnited States, and residents of Louisville, Jefferson county, Kentucky,have invented certain new and useful Improvements in Clamps forSnap-Molds, of which the following is a. specification containing afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part hereof.

Our invention relates to improvements in clamps for snap molds, theobject of our invention being to construct a simple, dura ble, easilyoperated clamp for retaining the parts of a sand mold in properregistration relative each other after they are removed from a flask.Heretofore, ordinary weights were employed for simply holding the partsof the mold together and in the use of which frequent destruction of themolds ensued and the handling of which was of considerable eifort andwhich weights were constructed of materials that might be readilyemployed otherwise. It was necessary to employ weights of differentsizes on different molds and consequently a considerable number ofweights were usually kept on hand.

For the above purposes our invention consists in certain novel featuresof construction and arrangement of parts as will be hereinafter morefully described, pointed out in the claims and illustrated by theaccompanying drawing, in which:

Figure 1 is a perspective of the complete clamp; and Fig. 2 is anelevation of a molding platform with a sand mold thereon and the clampin position for holding the mold in proper position.

Referring by numerals to the accompanying drawing: 1 designates themolding plat form which is of ordinary construction and 2, 3 and 4:designate members of the mold, which were formed in a snap flask and, asshown, are placed upon the platform 1.

5 designates a barred skeleton frame to be placed upon the uppermostmold member with its ends projecting preferably slightly beyond the endsof the mold members. At the ends of the skeleton frame are up-standing,perforated ears 6 preferably projecting beyond the ends of the frame andformed integral with the frame.

77 designate arms which are pivotally secured to the ears 6 and whicharms are each provided with a lug S for engagement with the frame tolimit the outward movements of the arms. At their free ends the arms areprovided with extensions 9 preferably formed integral therewith andwhich extensions occupy positions at an angle greater than ninetydegrees relative the arms, the uppermost, inner margins of eachextension being serrated. Intermediate the ends of the arms are thehandles 10 preferably arranged for rotation so that there may be rotarymovements about their axes to facilitate the handling of the arms.

In practical use assuming the mold members to be placed upon theplatform 1 after being removed from a flask and it be de sired tohold-them in perfect registration relative each other the frame 5 isplaced upon the uppermost mold, as shown in Fig. 2, and the arms 7 aremoved so that the ex tensions 9 engage underneath the ends of theplatform.

By reason of the angle of the extensions 5) it is obvious that the clampmay be applied to molds with slight difierences in heights, and byreason of the serrated margins of the extensions the arms are firmlyheld against freeing from the platform.

By the employment of such a clamp all of the cumbersome and uselesslynumerous weights now employed are dispensed with.

We claim:

1. In a device of the class described, the combination with a moldplatform of a frame arranged to overlay the mold, and arms constructedof a single piece pivotally secured at one end to said frame and adaptedto hook under said platform for securely holding the members of the moldtogether.

2. In a device of the class described, the combination with a moldplatform of a frame arranged to overlay the mold, and arms arranged inpairs pivotally secured to said frame and arranged to hook under saidplatform for securing the mold members together, each of said arms beingconstructed of a single piece of metal.

3. In a device of the class described, the combination with a moldplatform of a skeleton frame arranged to overlay the upper mold member,connected pairs of arms pivotally secured to said frame and havingintegral angular extensions arranged to hook underneath said platformfor securing the mold members together, each of said arms and itsangular extension being formed from a single piece of metal.

4. A snap mold clamp, comprising a skeleton frame having pairs ofintegral, perforated ears, arms arranged in pairs pivotally secured tosaid ears and an annular integral extension at the free end of each arm.

5. A snap mold clamp, comprising a skeleton frame integral earsadjacenteach end of each frame, an arm pivotally secured to each car, anextension on each arm at its free end arranged at an angle greater thanninety degrees relative the arm and means for limiting the movements ofsaid arms.

6. In a snap mold clamp, a skeleton frame,

perforated ears formed integral With said frame adjacent the ends of theframe, arms pivotally secured to said ears, angular extensions at thefree ends of said arms, handles coi'inecting the arms in pairs andintegral lugs on said arms for engagement with said frame for limitingthe movements of the arms.

In testimony whereof, We have signed our names to this specification, inpresence of two subscribing Witnesses.

HENRY J. GRAF. THEODORE H. GRAB. Witnesses 7M. H. JOHNSTON, C. J.GRAMIG.

